Phatch, that's not what "obverse" means. If a knife is only marked on one side, whether that's the left or right face, the marked side is the obverse, and the unmarked side is the reverse. If both sides of the knife are marked, the obverse/reverse distinction, if it applies at all, depends on the marking. On coins, which have neither left nor right, front nor back, and are (nearly) always stamped on both sides, the observe side is "heads" while "tails" is the reverse, always. See for instance, OED, 3d Ed.
There's NO DIFFERENCE between the Tojiro DPs sold at Cutlery and More and CKtG. They are the SAME MODEL KNIVES. If there's a difference in the pictures, it's ONLY in the pictures.